Abstract: One or more wheel apparatuses are provided. The wheel apparatus comprises one or more rigid climbing members that extend to the outer perimeter of the wheel apparatus and are configured to maintain shape and/or relative position over all surfaces the wheel apparatus encounters. The wheel apparatus comprises one or more selective flex zones located adjacent to rigid climbing members, constructed to be passively compressed when the wheel apparatus encounters an obstacle in the path of the wheel apparatus. The wheel apparatus comprises one or more support zones located adjacent to selective flex zones that provide support for smooth rotary motion when not traversing obstacles.